1 /* $OpenBSD: msg.c,v 1.20 2020/10/18 11:32:01 djm Exp $ */
3 * Copyright (c) 2002 Markus Friedl. All rights reserved.
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
8 * 1. Redistributions of source code must retain the above copyright
9 * notice, this list of conditions and the following disclaimer.
10 * 2. Redistributions in binary form must reproduce the above copyright
11 * notice, this list of conditions and the following disclaimer in the
12 * documentation and/or other materials provided with the distribution.
14 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
15 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
16 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
17 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
18 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
19 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
20 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
21 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
22 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
23 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
28 #include <sys/types.h>
45 ssh_msg_send(int fd, u_char type, struct sshbuf *m)
48 u_int mlen = sshbuf_len(m);
50 debug3_f("type %u", (unsigned int)type & 0xff);
52 put_u32(buf, mlen + 1);
53 buf[4] = type; /* 1st byte of payload is mesg-type */
54 if (atomicio(vwrite, fd, buf, sizeof(buf)) != sizeof(buf)) {
55 error_f("write: %s", strerror(errno));
58 if (atomicio(vwrite, fd, sshbuf_mutable_ptr(m), mlen) != mlen) {
59 error_f("write: %s", strerror(errno));
66 ssh_msg_recv(int fd, struct sshbuf *m)
72 debug3("ssh_msg_recv entering");
74 if (atomicio(read, fd, buf, sizeof(buf)) != sizeof(buf)) {
76 error_f("read header: %s", strerror(errno));
79 msg_len = get_u32(buf);
80 if (msg_len > sshbuf_max_size(m)) {
81 error_f("read: bad msg_len %u", msg_len);
85 if ((r = sshbuf_reserve(m, msg_len, &p)) != 0) {
86 error_fr(r, "reserve");
89 if (atomicio(read, fd, p, msg_len) != msg_len) {
90 error_f("read: %s", strerror(errno));